Journal
APPLIED SURFACE SCIENCE
Volume 431, Issue -, Pages 48-54Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.04.107
Keywords
TiB2 matrix composite coatings; In-situ; Reactive plasma spraying; Microhardness; Microstructure
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Funding
- National Natural Science Foundation of China [51672067, 51541208, 51102074, 51372065, 51402189]
- Natural Science Foundation of Hebei Province [E2015202070]
- Foundation for talent training project in Hebei Province [A2016002026]
- Foundation for the top talents in Universities in Hebei Province [SLRC2017027]
- Natural Science Foundation of Shanghai [13ZR1455300]
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TiB2-TiC and Ti-B4C composite powders were plasma sprayed onto the 45 steel substrates, respectively, for preparing TiB2 matrix composite coatings. The microstructure and properties of as-prepared coatings were investigated comparatively. The coating prepared by plasma spraying TiB2-TiC composite powder showed the characteristics of stacking of partially melted or unmelted feedstock particles, loose microstructure, high porosity, and poor property. For Ti-B4C system, the main phase TiB2 and TiC0.3N0.7 were formed due to the reaction between Ti and B4C during the plasma spraying process. The as-prepared coating displayed dense microstructure and better quality. The properties of the coating prepared by plasma spraying Ti-B4C composite powder were much better than that of the coating prepared by TiB2-TiC composite powder. (C) 2017 Elsevier B.V. All rights reserved.
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